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gerrit-public.fairphone.software / kernel / msm-4.19 / 8e591cb7204739efa8e15967ea334eb367039dde / . / arch / powerpc / kvm / book3s_pr_papr.c
blob: 4efa4a4f3722a430f1cf95a46eee4fa8c5b09f90 [file] [log] [blame]
Alexander Graf0254f0742011-08-08 17:21:15 +0200[diff] [blame]1/*
2 * Copyright (C) 2011. Freescale Inc. All rights reserved.
3 *
4 * Authors:
5 * Alexander Graf <agraf@suse.de>
6 * Paul Mackerras <paulus@samba.org>
7 *
8 * Description:
9 *
10 * Hypercall handling for running PAPR guests in PR KVM on Book 3S
11 * processors.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License, version 2, as
15 * published by the Free Software Foundation.
16 */
17
Benjamin Herrenschmidtf31e65e2012-03-15 21:58:34 +0000[diff] [blame]18#include <linux/anon_inodes.h>
19
Alexander Graf0254f0742011-08-08 17:21:15 +0200[diff] [blame]20#include <asm/uaccess.h>
21#include <asm/kvm_ppc.h>
22#include <asm/kvm_book3s.h>
23
24static unsigned long get_pteg_addr(struct kvm_vcpu *vcpu, long pte_index)
25{
26 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
27 unsigned long pteg_addr;
28
29 pte_index <<= 4;
30 pte_index &= ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1) << 7 | 0x70;
31 pteg_addr = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
32 pteg_addr |= pte_index;
33
34 return pteg_addr;
35}
36
37static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu)
38{
39 long flags = kvmppc_get_gpr(vcpu, 4);
40 long pte_index = kvmppc_get_gpr(vcpu, 5);
41 unsigned long pteg[2 * 8];
42 unsigned long pteg_addr, i, *hpte;
43
44 pte_index &= ~7UL;
45 pteg_addr = get_pteg_addr(vcpu, pte_index);
46
47 copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg));
48 hpte = pteg;
49
50 if (likely((flags & H_EXACT) == 0)) {
51 pte_index &= ~7UL;
52 for (i = 0; ; ++i) {
53 if (i == 8)
54 return H_PTEG_FULL;
55 if ((*hpte & HPTE_V_VALID) == 0)
56 break;
57 hpte += 2;
58 }
59 } else {
60 i = kvmppc_get_gpr(vcpu, 5) & 7UL;
61 hpte += i * 2;
62 }
63
64 hpte[0] = kvmppc_get_gpr(vcpu, 6);
65 hpte[1] = kvmppc_get_gpr(vcpu, 7);
66 copy_to_user((void __user *)pteg_addr, pteg, sizeof(pteg));
67 kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
68 kvmppc_set_gpr(vcpu, 4, pte_index | i);
69
70 return EMULATE_DONE;
71}
72
73static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu)
74{
75 unsigned long flags= kvmppc_get_gpr(vcpu, 4);
76 unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
77 unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
78 unsigned long v = 0, pteg, rb;
79 unsigned long pte[2];
80
81 pteg = get_pteg_addr(vcpu, pte_index);
82 copy_from_user(pte, (void __user *)pteg, sizeof(pte));
83
84 if ((pte[0] & HPTE_V_VALID) == 0 ||
85 ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn) ||
86 ((flags & H_ANDCOND) && (pte[0] & avpn) != 0)) {
87 kvmppc_set_gpr(vcpu, 3, H_NOT_FOUND);
88 return EMULATE_DONE;
89 }
90
91 copy_to_user((void __user *)pteg, &v, sizeof(v));
92
93 rb = compute_tlbie_rb(pte[0], pte[1], pte_index);
94 vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
95
96 kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
97 kvmppc_set_gpr(vcpu, 4, pte[0]);
98 kvmppc_set_gpr(vcpu, 5, pte[1]);
99
100 return EMULATE_DONE;
101}
102
Matt Evans3aaefef2012-01-30 20:25:31 +0000[diff] [blame]103/* Request defs for kvmppc_h_pr_bulk_remove() */
104#define H_BULK_REMOVE_TYPE 0xc000000000000000ULL
105#define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL
106#define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL
107#define H_BULK_REMOVE_END 0xc000000000000000ULL
108#define H_BULK_REMOVE_CODE 0x3000000000000000ULL
109#define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL
110#define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL
111#define H_BULK_REMOVE_PARM 0x2000000000000000ULL
112#define H_BULK_REMOVE_HW 0x3000000000000000ULL
113#define H_BULK_REMOVE_RC 0x0c00000000000000ULL
114#define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL
115#define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL
116#define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL
117#define H_BULK_REMOVE_AVPN 0x0200000000000000ULL
118#define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL
119#define H_BULK_REMOVE_MAX_BATCH 4
120
121static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu)
122{
123 int i;
124 int paramnr = 4;
125 int ret = H_SUCCESS;
126
127 for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) {
128 unsigned long tsh = kvmppc_get_gpr(vcpu, paramnr+(2*i));
129 unsigned long tsl = kvmppc_get_gpr(vcpu, paramnr+(2*i)+1);
130 unsigned long pteg, rb, flags;
131 unsigned long pte[2];
132 unsigned long v = 0;
133
134 if ((tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) {
135 break; /* Exit success */
136 } else if ((tsh & H_BULK_REMOVE_TYPE) !=
137 H_BULK_REMOVE_REQUEST) {
138 ret = H_PARAMETER;
139 break; /* Exit fail */
140 }
141
142 tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS;
143 tsh |= H_BULK_REMOVE_RESPONSE;
144
145 if ((tsh & H_BULK_REMOVE_ANDCOND) &&
146 (tsh & H_BULK_REMOVE_AVPN)) {
147 tsh |= H_BULK_REMOVE_PARM;
148 kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
149 ret = H_PARAMETER;
150 break; /* Exit fail */
151 }
152
153 pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX);
154 copy_from_user(pte, (void __user *)pteg, sizeof(pte));
155
156 /* tsl = AVPN */
157 flags = (tsh & H_BULK_REMOVE_FLAGS) >> 26;
158
159 if ((pte[0] & HPTE_V_VALID) == 0 ||
160 ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != tsl) ||
161 ((flags & H_ANDCOND) && (pte[0] & tsl) != 0)) {
162 tsh |= H_BULK_REMOVE_NOT_FOUND;
163 } else {
164 /* Splat the pteg in (userland) hpt */
165 copy_to_user((void __user *)pteg, &v, sizeof(v));
166
167 rb = compute_tlbie_rb(pte[0], pte[1],
168 tsh & H_BULK_REMOVE_PTEX);
169 vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
170 tsh |= H_BULK_REMOVE_SUCCESS;
171 tsh |= (pte[1] & (HPTE_R_C | HPTE_R_R)) << 43;
172 }
173 kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
174 }
175 kvmppc_set_gpr(vcpu, 3, ret);
176
177 return EMULATE_DONE;
178}
179
Alexander Graf0254f0742011-08-08 17:21:15 +0200[diff] [blame]180static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
181{
182 unsigned long flags = kvmppc_get_gpr(vcpu, 4);
183 unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
184 unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
185 unsigned long rb, pteg, r, v;
186 unsigned long pte[2];
187
188 pteg = get_pteg_addr(vcpu, pte_index);
189 copy_from_user(pte, (void __user *)pteg, sizeof(pte));
190
191 if ((pte[0] & HPTE_V_VALID) == 0 ||
192 ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn)) {
193 kvmppc_set_gpr(vcpu, 3, H_NOT_FOUND);
194 return EMULATE_DONE;
195 }
196
197 v = pte[0];
198 r = pte[1];
199 r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_HI |
200 HPTE_R_KEY_LO);
201 r |= (flags << 55) & HPTE_R_PP0;
202 r |= (flags << 48) & HPTE_R_KEY_HI;
203 r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO);
204
205 pte[1] = r;
206
207 rb = compute_tlbie_rb(v, r, pte_index);
208 vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
209 copy_to_user((void __user *)pteg, pte, sizeof(pte));
210
211 kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
212
213 return EMULATE_DONE;
214}
215
Benjamin Herrenschmidtf31e65e2012-03-15 21:58:34 +0000[diff] [blame]216static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
217{
218 unsigned long liobn = kvmppc_get_gpr(vcpu, 4);
219 unsigned long ioba = kvmppc_get_gpr(vcpu, 5);
220 unsigned long tce = kvmppc_get_gpr(vcpu, 6);
221 long rc;
222
223 rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce);
224 if (rc == H_TOO_HARD)
225 return EMULATE_FAIL;
226 kvmppc_set_gpr(vcpu, 3, rc);
227 return EMULATE_DONE;
228}
229
Alexander Graf0254f0742011-08-08 17:21:15 +0200[diff] [blame]230int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd)
231{
232 switch (cmd) {
233 case H_ENTER:
234 return kvmppc_h_pr_enter(vcpu);
235 case H_REMOVE:
236 return kvmppc_h_pr_remove(vcpu);
237 case H_PROTECT:
238 return kvmppc_h_pr_protect(vcpu);
239 case H_BULK_REMOVE:
Matt Evans3aaefef2012-01-30 20:25:31 +0000[diff] [blame]240 return kvmppc_h_pr_bulk_remove(vcpu);
Benjamin Herrenschmidtf31e65e2012-03-15 21:58:34 +0000[diff] [blame]241 case H_PUT_TCE:
242 return kvmppc_h_pr_put_tce(vcpu);
Alexander Graf0254f0742011-08-08 17:21:15 +0200[diff] [blame]243 case H_CEDE:
Benjamin Herrenschmidt1dee7a32012-07-09 22:48:17 +0000[diff] [blame]244 vcpu->arch.shared->msr |= MSR_EE;
Alexander Graf0254f0742011-08-08 17:21:15 +0200[diff] [blame]245 kvm_vcpu_block(vcpu);
Alexander Graf966cd0f2012-03-14 16:55:08 +0100[diff] [blame]246 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
Alexander Graf0254f0742011-08-08 17:21:15 +0200[diff] [blame]247 vcpu->stat.halt_wakeup++;
248 return EMULATE_DONE;
Michael Ellerman8e591cb2013-04-17 20:30:00 +0000[diff] [blame^]249 case H_RTAS:
250 if (list_empty(&vcpu->kvm->arch.rtas_tokens))
251 return RESUME_HOST;
252 if (kvmppc_rtas_hcall(vcpu))
253 break;
254 kvmppc_set_gpr(vcpu, 3, 0);
255 return EMULATE_DONE;
Alexander Graf0254f0742011-08-08 17:21:15 +0200[diff] [blame]256 }
257
258 return EMULATE_FAIL;
259}